. >>> well, the blue angels are thrilling. so are the golden knights. that's the army's precision parachuting team. their sky dives are just a small step compared to just what one man is plan this week. he is plan aing far fall. >> set to do what no man has ever done before. jump from a capsule attached to a giant balloon from 120,000 feet with a view that looks like this. >> i'm going to slide the door open, and i'm going to be the first human person in freefall to break the speed of sound. >> reporter: he makes it sound simple enough, but feelic's attempt to jump from the edge of space comes after five years of exhaustive testing, development, and even a legal hitch. what's the biggest challenge here? why has no one tried it before, and what's the challenge that you have managed to overcome, to make it possible? >> it needs a lot of research. it's not just you lock yourself in a pressure capsule and go up. you do a lot of research. you need to find the right people to work with. >> okay. now we're going to get serious. we're going to depressurize the